﻿#pragma warning(disable: 4996)
#pragma warning(disable: 6031)

#include <stdio.h>

// C=5×(F−32)/9
void solve(int F) {
	int C = 5*(F-32)/ 9;
	printf("Celsius = %d", C);
}

int main()
{
	freopen("D:/Develop/GitRepos/MOOC/浙江大学/数据结构/201906/DataStructure/M2019秋C入门和进阶练习集/7-7.txt", "r", stdin);
	int F;
	scanf("%d", &F);
	solve(F);
	return 0;
}